Weft detector to stop loom



No'v. 27, 1928.

V. H. JENNINGS WEFT DETECTOR TO STOP LOOM Filed July 18, 1927 2 Sheets-Sheet Nov. 27, -1 928. 1,692,992

V. H. JENNINGS WEFT DETECTOR TO STOP LOOM Filed July 18, 192"! 2 Sheets-Sheet 2 W w wk Patented Nov. 27, 1928.

UNITED STATES VICTOR KNOWLES LOOM WORKS, OF WORCESTER,

MASSACHUSETTS.

Application filed July is,

This invention relates to weft detector mechanisms to stop looms and it is the general object of the invention to provide a simple form of detector which will stop the loom prior to complete exhaustion of the filling in order that the latter may be replenished.

In mechanisms of this kind it is desirable to have the detector operatein such a way that the loom may be turned over by hand without setting the stopping mechanism and it is a further object of my present invention to accomplish this result by means of a weft detector which is normally in non-stopping position and moves to stopping position only at such times as it is engaged by a depleted supply of weft.

The weft detector will ordinarily operate when the lay is in its extreme forward position and only a short time be forethe shuttle is picked. If the power should be thrown off at this time the loom might continue to move until the lay reached top center at which time the shuttle is picked. The pick would therefore be weak and the shuttle would not reach the opposite box. It is a further object of my present invention to provide for stopping the loom sufiiciently early in the pick to prevent the shuttle from being acted on to leave the box after the power has been thrown off. This result I accomplish by having the weft detector control mechanism which sets the brake of the-loom while the lay is still a considerable distance from its front position while it is moving forwardly.

' The effect of this operation is to stop the loom with the shuttle on that side of the lay opposite the detector and when the brake is set tightly the loom can be stopped before the box on the opposite end of the loom would start to move. In this way the lay is stopped with the depleted shuttle opposite the race so that the attendant may remove the shuttle with a minimum of interference on the part of the box mouth and lay.

A still further object of my invention is to employ the shipper rod to reset the shield controlled by the detector, thus relieving the attendant of the necessity of restoring the parts to normal position. The resetting occurs when the weft detector is not detecting weft and when said detector will not interfere with the resetting operation.

With these and other objects in view which H. JENNINGS OF WORCESTER, MASSACHUSETTS, ASSIGNOR TO CROMPTON &

MASSACHUSETTS, A CORPORATION OF WEF'I DETECTOR TO STOP LOOM.

1927. Serial No. 206,474.

will appear as the description proceeds, my invention resides in the combination and ar rangement of parts hereinafter described and set forth in the claims.

In the accompanying drawings, wherein I have shown aconvenient embodiment ofmy invention, 7

Fig. 1 is a top plan view of the right hand forward port-ion of a loom showing part of the lay, shuttle and breast beam with my invention applied thereto,

Fig. 2 is a vertical section on line 2-2 of Fig. 1 showing the parts in normal running position with the detector in engagement with a sufficient supply of weft,

Fig. 3 is a detailed vertical section on line 3-3 of Fig. 1,

Fig. 4 is a section on line 44 of Fig. 1 showing the parts in normal position such as exists when there is a suflicient supply'of weft,

Fig. 5 is a view similar to Fig. 4: but with the parts in loom stopping position on the beat-up following that on which the detector gave indication to stop the loom,

Fig. 6 is'a view similar to Fig. 4;, but showmg the resetting device for the shield. in operative position at the time the shipper handle is rocked to stop the loom, i

v Figs. 7 and 8 are vertical sections on lines 77 and88, respectively, of Figs. l and .5, respectively, and

Fig. 9 is a detailed horizontal section on line 9-9 of Fig. 7 7

Referring to Figs. 1 and 2 it will be seen that I have provided a lay 10 and a loom frame 11 with abreast beam 12. A shipper rod 13 is journaled in the loom frame and has secured thereto a shipper handle 14. The lower end of said handle has pin and slot engagement with a loom controlling lever15, I

the connection being such that when the handle is pulled to the left as shown in Fig. 2" the lever 15 will move to cause driving of the loom and when the lever is moved to the right from the position shown in Fig. 2 said lever 15 will operate to throw ofi the driving mechanism. This part of the construction,

particularly the pin and slot connection between the levers 14 and 15, is substantially the same as that shown in Patent No. 198,202 issued to L. J ,K'nowles December 18, 1877.

Pivoted on, the underside of the breast int beam is a rolling rod 16 to the outer end of which is secured a brake'lever 17 having a low notch 18 and a high notch 19. Said notches cooperate one at a time with a roll- 20 carried on a lever 21. loosely pivoted on the shipper rod 13, the lower end of said lever 21 having connection with a rod 22 which extends rearwardlyto the brake mechanism. Said rod has adjustably secured thereto collar 23 having a finger 2 1 to extend behind the depending arm 25 of the shipper handle.

14. A bunter 26 having a notch 27 is secured by means of set screw 28 to the rolling rod.

The construction thus far described will normally be in the position shown in Fig. 2, the high notch 19- cooperating with lever 21 to hold the brake rod 22 l'earwardly so that the collar 23 will be spaced from the depending arm 25'0f the shipper handle. The latter will be in the full line position shown in F ig. 2 and when the hunter 26 is acted upon by mechanism to be described hereinafter the rolling rod 16 will rock in a right hand direction as'viewed in Fig. 2 to permit the lever 21 to have a right hand movement vention. v

The lay has secured thereto stand 30 having a stud 31 on which is journaled a holder 32 supporting a dagger 33. Said holder and dagger are held normally yieldingly in raised position by means of a torsion spring 34: one end of which is secured to the stud'31 and the other end of which passes over 7 lug 85 extending from the holder 32 as shown in Fig. 1. The dagger 33 moves forwardly with the lay and is the means by which the bunter 26 and rolling rod 16 are made to rock when-the filling is substantially exhausted.

The weftdetector may be ofany approved form but I have elected to show herein the type set forth in. co-pending application Serial No. 200,481 filed by Payne. Said detector'comprises a stand 40 bolted to the loom frame andhaving a platform 11 on which is mounted a detector bed and cap 42 and 13, respectively. A slide 44 is-guided in the'bedand is restrained against upward displacement by the cap andhas pivoted at the rear end thereof a side slipping weft detector 45. Said detector has an offset yarn engaging toothed surface 16 and also has a forwardly extending tail 47 by means of which thechange in the operation of the loom is effected. A compression spring 18 interposed between a part of the detector and the bed and cap acts normally to hold the slide and detector in rear position. So long as sufficient yarn is present on the bobbin B the detector will move forwardly to the full line position shown in Fig. 1 compressing spring 18 but when insufficientyarn is present said detector will swing around its pivotal connection with the slide to assume the dotted line position shown in Fig. 1. In this'position the tail 47 will rock controller 49 about stud 50. Said stud is held fixed with respect to the stand 10 and the controller has pivotal connection with a substantially horizontal rod 51. The detector and rocking member 49 may be substantially the same as shown in the aforesaid Payne application and of themselves form nopart of my present invention.

In carrying my invention into effect I provide a movable shield for the bunter,said shield normally disabling the dagger. but being released by the detector to permlt stopping engagement between the dagger and the bunter when the weft is substantially exhausted. As shown herein I pivot a shield loosely on the rolling rod 16 and determine the longitudinal position thereof along said rod by means of a collar61 onone side of said shield and by means of the aforesaid bunter 26 onthe other side of said shield. Said shield has a rounded cam face 62 on the rear side thereof and is also provided, 7

65 pivoted to the breast beam as at 66. Said lock lever has connection with the rod 51 as indicated in Figs. 7 and 8 and is controlled by said rod. The lock lever may be provided with a weighted arm 67 to act normally to move said lever into locking position as shown in Fig. 7. The shipper rod-.13 has adjustablysecured thereto a preferably flexible resetting'arm 70 which lies in the same vertical plane as the weighted arm 63.

In operation the shield will normally be in the position shown in Fig. 1 and as the dagger moves forwardly with the lay it will be depressed by the cam face 62 to avoid the hunter. As the lay continues its forward movement the detector will engage the bobbin to feel for the amount of yarn present. -So long as suflicient yarn is in the shuttle for continued weaving the detector will move forwardly without having an angular movement relatively to the slide 44 and the rod 51 will remain in its normal position) :V] hen insufficient yarn remains on the bobbin, however, the detector will. slide along the denuded-bobbin to have an angular movement with respect to its supporting slide so that the tail 47 will rock the member 49from the full to the dotted line position shown in Fig; 3. This occurs when the lay is on its extreme forward position and with the forward end of the dagger considerably in advance of the bunter.

till

' stopping position.

This rocking action ofthe member 49 will move the lock lever '65 from the position shown'in Fig. 7 to that shown in Fig. 8, whereupon the weighted arm 63 of the shield will move the latter from the position shown in Fig. 4 to that shown in Fig. 5, thus carrying the cam face 62 above the path of the dagger and exposing the notch 27. The loom will continue torun and the shuttle will be picked to that side of the loom opposite the detector as the lay reaches top center on its backward stroke. As the lay moves forwardly on the next pick, however, the notch 27 will still be exposed and the dagger will enter the same to roll the rod 16 and set the brake and also throw power off the loom by means of the shipper handle.

The movement of the shipper handle will carry the resetting finger from the position shown in Fig. 5 to that shown in Fig. 6 into engagement with the weighted arm 63. The resetting arm in this way restores the shield to its normal position, depressing the dagger and permitting the weighted part 67 of the lock lever 65 to move the latter over the finger 64. The locking lever is free to have this movement because the box on the near side of the lay is empty and therefore the detector is unmoved and offers no resistance to the resetting of the locking lever 65. After the attendant has changed the bobbin in the shuttle the shipper handle will be pulled to start the loom and to move the resetting arm 70 to the down position shown in Figs. 4' and 5 where it will notinterfere with the next rocking of the shield.

From the foregoing it will be seen that I have provided means to stop the loom by a weft detector, the power being thrown off and the brake applied while the shuttle is on the side of the loom opposite the detector. It will further be seen that the stopping mechanism acts on the brake device and through the latter moves the shipper mechanism to Also, the detector is so constructed as normally to leave the device in running position so that the loom may be turned over by hand without an operation of the loom stopping mechanism. Furthermore, it will be seen that the resetting arm on the shipper handle acts to restore the parts to normal position without further attention on the part of the operator and when the shuttle is on the opposite side of the loom where it cannot move the detector, leaving the latter out of control of the resetting mechanism.

Having thus described my invention it will be apparent that changes and modifications may be made the-rein by those skilled in the art without departing from the spirit and scope of the invention and I do not wish to be limited to the details herein disclosed, but what I claim is: I

1. In a stopping mechanism for a loom having a lay and a weft carrier, a dagger car- .mounted on the frame, a hunter secured to the rolling rod and having a portion to be engaged by the dagger, a shield normally intel-posed between the dagger and the bunter to move said dagger out of position with respect to the hunter, a weft detector to engage the weft carrier, and means effective when the detector indicates substantial exhaustion of weft on the carrier to move said shield out of normal position whereby said dagger may engage the hunter to cause movement of the rolling rod to stop the 100111.

In stopping mechanism for a loom hav ing a frame and a lay, a dagger yieldingly mounted on the lay, a rolling rod mounted on the frame, a bunter secured to the rolling rod,

a shield normally tending to move to a position to expose the hunter, a lever normally holding the shield in position to engage the dagger and move the same away from the hunter, a weft detector, and means effective when the weft detector indicates weft exhaustion to move said lever out of restraining position with respect to the shield whereby said shield moves to expose the hunter to the dagger.

4. In stopping mechanism for a loom having a frame and a lay, a yielding dagger mounted on the lay, stopping mechanism including a bunter on the frame, a shield weighted to move away from shielding position with respect to the hunter, a lever pivoted to the frame and normally holding the shield in shielding position with respect to the hunter to cause said shield to engage the dagger and deflect the same away from the bunter as the lay advances, a weft detector, and connections between the detector and lever effective when the detector indicates substantial weft exhaustion to move said lever out of position with respect to the shield whereby the latter moves to expose the bunter to the dagger.

5. In a stopping motion for a loom having a frame and a lay, a. dagger mounted on the lay, stopping mechanism including a rolling rod rotatably mounted on the frame, a bunter secured to the rolling rod, a shield loosely mounted on the rolling rod and having a portion normally interposed between the hunter and the dagger, means tending normally to move the shield to a position to expose the iTlO hunter to the dagger, an element normally preventing movement of the shieldto expose the hunter, and a weft detector effective upon indication of weft exhaustion to move said element out of position with respect to the shield whereby the latter exposes the hunter to the dagger.

6. Ina stopping motion for a loom having a lay, a dagger on the lay, stopping mecha nism including a hunter to be engaged by the dagger, a shield normally positioned to prevent engagement of the dagger and hunter, a weft detector, anelement under control of the detector normally holding the shield in position to prevent engagement of the hunter and dagger, a shipper rod to be rocked when the loom is stopped, said detector when indicating substantial weft exhaustion moving the element out of position with respect to the shield whereby the latter exposes the hunter to the dagger, and means moving with the shipper red as the latter moves to stop the loom to restore the shield to normal position.

7. In a stepping mechanism for a loom having a lay, a dagger on the lay, stopping mechanism including a hunter to be engaged hy'the dagger, a shield for the hunter, a lever pivoted to the frame and normally holding the shield in a position to prevent engagement. of the hunter and dagger, a weft detector effective to move the lever out of position with respect to the shield at substantial exhaust-ion of weft, means to move the shield to expose the hunter to the dagger when the detector indicates weft exhaustion, and a member movable at the time the loom is stopped to restore the shield to normal position.

8. In stopping mechanism for a loom having a lay, a dagger on the lay, stopping mechanism including a hunter to he engaged by the dagger, a shield normally shielding the hunter and tending to move away from shielding position with respect to the hunter, a weft detector, an element controlled by the Weft detector normally holding the shield in shielding position with respect tothe hunter and effective when the detector indicates substantial weft exhaustion to move out of position with respect to the shield whereby the shield will expose the hunter to the dagger, a shipper rod, and means carried by the shipper rod to engage the shield and restore the same to normal position at the time the loom is stopped.

9. In stopping'mechanism for a loom having a lay and a Weft carrier, a dagger carried by the lay, stopping mechanism including a hunter, a shield normally shielding the hunter to be engaged by the dagger, and means to engage the carrier and effective at substantial exhaustion of weft on the carrier to move said shield to a position to expose the hunter when the lay is in its extreme forward position on an indicating beat of the loom after the dagger has passed in front of the hunter, said dagger on the next forward movement of the lay engaging theihunter to stop the loom. 1

10. In stopping mechanism for a loom having a lay to carry a shuttle which is moved from one side to the other of said lay, a dagger carried by the lay, a weft detector mounted adjacent one end of the lay and effective to detect the condition of weft in the shuttle when the same is on the detector end of the lay, a shield, stopping mechanism including a hunter normally guarded by the shield, and means effective when the weft detector indicates substantial exhaustion of weft in the shuttle to move said shield to expose the hunter when the lay is near the limit of its forward movement on an indicating heat after the dagger has passed beyond the hunter, said dagger on the next forward movement of the lay engaging. the hunter to stop the loom when the shuttle is on the opposite side of the lay from the detector. I

11. In stopping mechanism for a loom having a, weft carrier, a brake lever and a shipper lever, a rolling rod operatively connected to the brake lever, a hunter secured totherolling rod, a lay, a dagger carried by the lay, a shield normally preventing engagement of the hunter and dagger as the lay advances, a. weft detector to cooperate with the carrier. and effective on indication of substantial weft exhaustion on the carrier to expose the hunter to the dagger to move the rolling rod and brake lever, and means to move the shipper lever to stopping position when the rolling rod is moved by the dagger. I V

In testimony whereof I have hereunto affixed my signature.

7 VICTOR H. JENNINGS.

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